1 United States Median Center of Population, 1880-2000 http://www.census.gov/geo/www/cenpop/calculate2k.pdf).]]> Animation (1024x512) This animation shows the median center of population for the United States from each census from 1880-2000. 1 0 1880-01-01 2010-01-01 1880 1 1 1880-01-01 1890-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003164/frames/1024x512/popmedian0001.png 22 52 -126 -66 1890 1 1 1890-01-01 1900-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003164/frames/1024x512/popmedian0002.png 22 52 -126 -66 1900 1 1 1900-01-01 1910-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003164/frames/1024x512/popmedian0003.png 22 52 -126 -66 1910 1 1 1910-01-01 1920-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003164/frames/1024x512/popmedian0004.png 22 52 -126 -66 1920 1 1 1920-01-01 1930-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003164/frames/1024x512/popmedian0005.png 22 52 -126 -66 1930 1 1 1930-01-01 1940-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003164/frames/1024x512/popmedian0006.png 22 52 -126 -66 1940 1 1 1940-01-01 1950-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003164/frames/1024x512/popmedian0007.png 22 52 -126 -66 1950 1 1 1950-01-01 1960-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003164/frames/1024x512/popmedian0008.png 22 52 -126 -66 1960 1 1 1960-01-01 1970-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003164/frames/1024x512/popmedian0009.png 22 52 -126 -66 1970 1 1 1970-01-01 1980-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003164/frames/1024x512/popmedian0010.png 22 52 -126 -66 1980 1 1 1980-01-01 1990-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003164/frames/1024x512/popmedian0011.png 22 52 -126 -66 1990 1 1 1990-01-01 2000-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003164/frames/1024x512/popmedian0012.png 22 52 -126 -66 2000 1 1 2000-01-01 2010-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003164/frames/1024x512/popmedian0013.png 22 52 -126 -66 Background Image 0 0 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003164/frames/1024x512/background-bluemarble-unitedstates.png 22 52 -126 -66